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Multiple linear regression in Python
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sklearn.linear_model.LinearRegression will do it:
from sklearn import linear_model
clf = linear_model.LinearRegression()
clf.fit([[getattr(t, 'x%d' % i) for i in range(1, 8)] for t in texts],
[t.y for t in texts])
Then clf.coef_ will have the regression coefficient...
Search and replace a line in a file in Python
...es the content to a new file and replaces the old file with the new file:
from tempfile import mkstemp
from shutil import move, copymode
from os import fdopen, remove
def replace(file_path, pattern, subst):
#Create temp file
fh, abs_path = mkstemp()
with fdopen(fh,'w') as new_file:
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How to install a node.js module without using npm?
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You need to download their source from the github. Find the main file and then include it in your main file.
An example of this can be found here > How to manually install a node.js module?
Usually you need to find the source and go through the package.j...
Differences between Perl and PHP [closed]
... used PHP until now, I wanted to know a bit about how the languages differ from each other.
6 Answers
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startsWith() and endsWith() functions in PHP
...function.strrpos.php: "If the value is negative, search will instead start from that many characters from the end of the string, searching backwards." This seems to indicate that we're starting at character 0 (due to -strlength($haystack)) and searching backward from there? Doesn't that mean you're ...
AsyncTask and error handling on Android
I'm converting my code from using Handler to AsyncTask . The latter is great at what it does - asynchronous updates and handling of results in the main UI thread. What's unclear to me is how to handle exceptions if something goes haywire in AsyncTask#doInBackground .
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Disable same origin policy in Chrome
...ntents of an iframe with src="http://google.com" embedded in a page served from "localhost" (tested under chromium 5 / ubuntu). For me the exact command was:
Note : Kill all chrome instances before running command
chromium-browser --disable-web-security --user-data-dir="[some directory here]"
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How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:?
...cept no parameters, but you can just let the block capture those variables from your local scope instead.
int parameter1 = 12;
float parameter2 = 144.1;
// Delay execution of my block for 10 seconds.
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 10 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
...
How to read data when some numbers contain commas as thousand separator?
..."num.with.commas")
setAs("character", "num.with.commas",
function(from) as.numeric(gsub(",", "", from) ) )
Then run read.csv like:
DF <- read.csv('your.file.here',
colClasses=c('num.with.commas','factor','character','numeric','num.with.commas'))
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node.js hash string?
...e md5sum.update(d) function to execute every time there is data being read from the ReadStream?
– DucRP
Jul 14 '15 at 17:01
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